title: Cross linguistic aphasia testing: the Portuguese version of the Aachen Aphasia Test (AAT).
abstract: We report the adaptation of the Aachen Aphasia Test (AAT) to the Portuguese language (PAAT) and the results of its standardization in 125 persons with aphasia and 153 healthy controls. Patients with aphasia had a previous syndromic diagnosis, obtained through a Portuguese aphasia battery, which served as a reference. The control group was stratified by age and educational level. Hierarchical cluster analyses showed good construct validity. The increasing degree of difficulty and complexity throughout the item sets comprising subtests was confirmed. The discriminatory power of the PAAT for the selection of aphasic from non-aphasic persons proved to be as high as for the AAT versions in other languages. Classification of standard aphasic syndromes by means of discriminant analyses was good. Internal consistency, measured by means of Cronbach's alpha coefficient, was high to very high for the different PAAT subtests. Performance differences caused by age or educational level among the healthy control persons emphasized the need for correction factors. In conclusion, the PAAT showed robust psychometric properties, comparable to the original German and to adaptations to other languages. It constitutes a useful tool for cross-linguistic and multicenter studies.
authors.affiliation: Language Research Laboratory (LEL, Laboratório de Estudos de Linguagem), Institute of Molecular Medicine (IMM, Instituto de Medicina Molecular), Faculty of Medicine, Lisbon, Portugal. mlauterbach@fm.ul.pt
authors.forename: Martin
authors.initials: M
authors.lastname: Lauterbach
authors.forename: Isabel Pavão
authors.initials: IP
authors.lastname: Martins
authors.forename: Paula
authors.initials: P
authors.lastname: Garcia
authors.forename: Joana
authors.initials: J
authors.lastname: Cabeça
authors.forename: Ana Cristina
authors.initials: AC
authors.lastname: Ferreira
authors.forename: Klaus
authors.initials: K
authors.lastname: Willmes
mesh_terms: D000328:Adult; D000368:Aged; D001037:Aphasia / Q000175:diagnosis*; D016000:Cluster Analysis; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007807:Language Tests; D008037:Linguistics; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests / Q000592:standards; D011174:Portugal; D015203:Reproducibility of Results